body {
    width: 100%;
    max-width: 640px;
    min-width: 320px;
    margin: 0 auto;
    background-color: #f6f6f6;
}

.header {
    height: 45px;
    background-color: #232326;
    text-align: center;
    line-height: 45px;
}

.header div[class]{
    float: left;
}

.header .close_window {
    width: 8%;
}

.header .close_window img {
    width: 16px;
}

.header .logo {
    width: 10%;
}

.header .logo img {
    width: 30px;
}

.header .open_client_text {
    width: 57%;
    font-size: 14px;
    color: #fff;
}

.header .open_client {
    width: 25%;
    font-size: 14px;
    color: #fff;
    background-color: #f63515;
}

.search {
    overflow: hidden;
    position: relative;
    height: 45px;
    background-color: #c82519;
}

.search .goods_list, .search .sign_in {
    position: absolute;
    top: 0;
    width: 40px;
    height: 45px;
}

.search .goods_list {
    left: 0;
    background: url(../images/goods_list.png) no-repeat 10px 14px;
    background-size: 50%;
}

.search .sign_in {
    right: 0;
    font-size: 14px;
    line-height: 45px;
    color: #fff;
}

.search .searchbox {
    position: relative;
    height: 30px;
    margin: 0 50px;
    /* 外边距合并，需要在父盒子加上overflow:hidden */
    margin-top: 7px;
    background-color: #fff;
    border-radius: 30px;
}

.search .searchbox .jd_icon {
    position: absolute;
    top: 8px;
    left: 15px;
    height: 15px;
    width: 20px;
    background: url(../images/jd.png) no-repeat;
    background-size: 100%;
}

.search .searchbox .jd_icon::after {
    position: absolute;
    left: 25px;
    content: '';
    height: 15px;
    width: 1px;
    border-right: 1px solid #ddd;
}

.search .searchbox .search_icon {
    position: absolute;
    top: 8px;
    left: 50px;
    height: 15px;
    width: 20px;
    background: url(../images/jd-sprites.png) no-repeat -80px 0;
    background-size: 200px;
}

.lunbo {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 140px;
    
}
.lunbo .bg_color {
    background-image: linear-gradient( 0deg, #f1503b, #c82519 50%);
    position: absolute;
    top: 0;
    left: -25%;
    width: 150%;
    height: 100px;
    border-bottom-left-radius: 100%;
    border-bottom-right-radius: 100%;
}
.lunbo .lunbo_pic {
    position: relative;
    overflow: hidden;
    margin: 0 15px;
    height: 140px;
    background-color: pink;
    border-radius: 5px;
    z-index: 2;
}
.lunbo .lunbo_pic img {
    width: 100%;
    height: 100%;
}
.brands {
    height: 100px;
}
.brands div[class] {
    float: left;
    width: 33.33%;
    height: 100px;
    background-color: #fff;
}
.brands a {
    display: block;
    height: 100%;
    width: 100%;
}
.brands img {
    height: 100%;
    width: 100%;
}
.nav .nav_items {
    position: relative;
}
.nav ul li {
    float: left;
    width: 20%;
    height: 80px;
    padding: 10px 0;
    text-align: center;
}
.nav ul li a {
    display: block;
}
.nav .nav_pic {
    width: 100%;
    height: 40px;
}
.nav ul li img {
    height: 100%;
}
.nav .tabBox {
    width: 100%;
    vertical-align: middle;
    text-align: center;
    line-height: 0;
    font-size: 0;
}
.nav .tabBox span {
    display: inline-block;
    margin: 0 5px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background-color: #fa2c19;
}
.main {
    height: 110px;
    margin: 0 10px;
    margin-top: 10px;
    background-color: #fff;
    border-radius: 5px;
}
.main ul li {
    float: left;
    width: 25%;
    text-align: center;
}
.main .g_title h4 {
    height: 16px;
    width: 100%;
    margin: 10px 0;
    font-size: 16px;
    color: #000;
    line-height: 18px;
}
.main .g_title p {
    height: 12px;
    width: 100%;
    line-height: 12px;
}
.main .g_pic {
    height: 60px;
}
.main .g_pic img {
    height: 100%;
}